food (is waiting/has waited) for them at the foot of the hill.请问这个选进行时还是完成时,为什么?

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food (is waiting/has waited) for them at the foot of the hill.请问这个选进行时还是完成时,为什么?
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food (is waiting/has waited) for them at the foot of the hill.请问这个选进行时还是完成时,为什么?
food (is waiting/has waited) for them at the foot of the hill.请问这个选进行时还是完成时,为什么?

food (is waiting/has waited) for them at the foot of the hill.请问这个选进行时还是完成时,为什么?
is waiting
意思应该是:食物正在等着他们.而不是食物已经等了他们多长时间.